---
layout: docs
page_title: Domain Model - Host Sets
description: |-
  The anatomy of a Boundary host set
---

# Host Sets

A host set is a resource
that represents a collection of [hosts][]
which are considered equivalent
for the purposes of access control.
A host set can only include hosts
from the same [host catalog][] as the host set.
A [target][] can reference host sets from host catalogs
which belong to the same [project][] as the target.

## Attributes

A host set has the following configurable attributes:

- `name` - (optional)
  If set, the `name` must be unique within the host set's parent [host catalog][].

- `description` - (optional)

## Referenced By

- [Host][]
- [Host Catalog][]
- [Target][]

[host catalog]: /docs/concepts/domain-model/host-catalogs
[host catalogs]: /docs/concepts/domain-model/host-catalogs
[host]: /docs/concepts/domain-model/hosts
[hosts]: /docs/concepts/domain-model/hosts
[project]: /docs/concepts/domain-model/scopes#projects
[projects]: /docs/concepts/domain-model/scopes#projects
[target]: /docs/concepts/domain-model/targets
[targets]: /docs/concepts/domain-model/targets

## Service API Docs

The following services are relevant to this resource:

- [Host Set Service](/api-docs/host-set-service)